– Press Enter, and wait for the process to finish. – Enter the following line into the PowerShell: Get-AppXPackage -AllUsers | Foreach – Go to Search, type powershell, right-click on PowerShell, and choose Run as Administrator. – In the top left portion of the Services Window, Click Start this service. – Under Startup type dropdown select Automatic. – Find Windows Firewall, right-click on it, and choose Properties. – Go to Search, type services.msc, and open Services.

Make sure your Windows Firewall is Enabled Here is what I did to solve the This app can't open error.ġ. WTF! I didn’t know the calculator was on trial! You may also encounter this error with other pre-installed Windows applications. Visit the Windows Store to purchase the full app.

Your trial period for this app has expired.

So you already got used to Windows 10 and things are working fine and suddenly one day you want to open calculator and you receive this error message “This app can’t open.